This is not even exaggerated, FTK (first turn kill) and OTK (one turn kill) are totally common. Back in the day of Yu-Gi-Oh, our group of friends occasionally using those "imbalance" or "META" decks to duel each other to have a little bit of fun and have some laughs when we feel "burn-out" playing with regular decks.

Besides FTK and OTK, there are also decks that's just built to "annoy" the opponent lol.

Like completely locking the play field so no one can really do anything but skip their turns.

Locking your own field so the opponent cannot attack you, they can summon the strongest cards in their deck to just sit there and slowly fill up their own field.

Summon tons of token cards (disposable) so your opponent wasting all of their attack without doing any damages.

Make your opponent burn (discard) all of their decks.

Insanely fast regenerate LP (life points), so unless your opponent can kill you in one turn, you'll just keep getting your LP regenerate.

Suicide deck to kill you both so the match end in a draw. (Robbing your opponent of satisfaction).